20Cr21Ni12N 21-12N - GB /T 12773-2021 - H2ABC

中文版

Grade	20Cr21Ni12N
Other Names
Corresponding Standard	GB /T 12773-2021 Valve Steel and Superalloy Bars for Internal Combustion Engines
Classification	Austenitic Stainless Steel

20Cr21Ni12N Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	N
Minimum Value	0.15	0.75	1	-	-	20.5	10.5	-	0.15
Maximum Value	0.25	1.25	1.6	0.035	0.03	22.5	12.5	0.3	0.3

20Cr21Ni12N Mechanical Properties

condition	Test Temperature	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW
Sample d=25	Room Temperature	1100~1200°C Solution treatment + 700~800°C Air cooling	≥820	Rp0.2: ≥430	≥26	≥20
Bar or Coil	Room Temperature	Solution treatment					≤300
sample		Solution treatment + Aging	High Temperature Short-Term Tensile Strength 600	High temperature short-term yield strength 250
sample		Solution treatment + Aging	High Temperature Short-Term Tensile Strength 550	High-temperature short-term yield strength 230
sample		Solution treatment + Aging	High Temperature Short-Term Tensile Strength 500	High-temperature short-term yield strength 210
sample		Solution treatment + Aging	High temperature short-term tensile strength 440	High-temperature short-term yield strength 200
sample		Solution treatment + Aging	High-temperature short-term tensile strength 370	High-temperature short-term yield strength 180
sample		Solution treatment + Aging	High Temperature Short-Term Tensile Strength 300	High temperature short-term yield strength 160
sample		Solution treatment + Aging	High temperature short-term tensile strength 240	High temperature short-term yield strength 130

Approximate Comparison Table Austenitic Heat-Resistant Steel

China	Japan	United States
GB	JIS	SAE
20Cr21Ni12N	SUH37	EV4

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!